Improvement in stop-motions for looms



UNITED STATES CHRISTOPHER DUCKIVORTH, OF MOUNT CARMEL, CONNECTICUT.

IMPROVEMENT IN STOP-MOTIONS FOR LOOMS.

Specification forming part of Letters Patent N0. 44,080, dated September 6, 1354.

To a/Z whom it may concern:

Be it known that l, CHRISTOPHER DUCK- WORTH, of Mount Carmel, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Stop-Motions for Looms for Weaving Fignred Fabrics; and I do hereby declare that the following is a full, clear, and exact descriplion of the construction, character, and op.

eration of the same, reference being had to the accompanying drawings, which make part ot' this specification, in which- Figure 1 is a perspective view of a portion of a loom, when looking downward from the front and right-hand corner, showing the portion of the lling or woof threads, hook, liftingfork, the safety rock-shaft, &c. Fig.,2 is a perspective view of the same, when looking upward from the front left-hand corner, showing the part under the breastbeam, Ste. Fig. 3 is a perspective view of the part of the stop apparatus which carries the hook which is caught by the last filling-thread, and the part which works the rock-shaft, so as not to stop the loom. Fig. 4 is a perspective view ofthe lifting-fork which raises the last filling-thread, so as to catch the hook, Fig. 3.

My improvement consists in so constructing and arranging the parts of the stop apparatus that by means of a safety rock-shaft to force up the hook so as to lift the last lilling-thread above those from the same sel vage, a hook, which is caught and worked by the last filling-thread, (if whole,) operates so as to rock another shaft to prevent the connection of the levers which stop the loom 5 and in that, if the last iilling-thread is broken so that it does not catch the hook which works the second rock-shaft, a loose iingerwill be brought up to connect the levers and stop the loom before it can make another pick.

I make the lower frame of the loom of posts A A, Src., and bars or beams B B, Ste., and

mount the upper frame of posts, C C, &c., and

bars B B, 85e., on it, and iit the cam-wheels E E and the levers, Src., for working the picker-staffs, shuttle-boxes, &c., all in the usual way for ligure-looms, and I hang the lathe from below, as the uprights or arms are shown at F F, and the race-beam at G, Figs. 1 and 2.

On each end of the race-beam G, in connection with the shuttle-boxes, and restingagainst the picker-blocks, I fit a curved lever, a, which works on a fulcruin-pin at b, and the outer or short end is thrown out by an india-rubber spring, c, one of which levers, &c.', is shown in Figs. 1 and 2. (The one on the other end and the accompanying parts are omitted, bein g exactly similar to those shown.)

On the front side and near the lower angle of the race-beam G, I place in suitable bearings a safety rock sha't, I-I, on which I have arms cl d at or near right angles, the upper ends of which arms rest against the inner ends of the levers a, and on the under side of this rock-shaft H, I have a bentarm, e, Figs. 1 and 2, the rear end of which works freely in the holefin the lower end of the stock of the lifting-fork, Fig. 4, as shown in Fig. 2, so that when the picker-block is thrown forward to shoot the shuttle the inner end of the lever a is forced inward by the rubber-sprin g c, and the fork, Fig. 4, is allowed to descend below the line of the shuttle, and when the pickerlock returns to its place, as shown at g, Fig. 1, the inner end of the lever a will be forced outward,and will press back the upper end of the arm d, so as (by the arm c) to raise the lifting-fork, Fig. 4, to the position shown in Fig. l, with the last filling-thread resting on the tines l l of the fork. On this rock-shaft H, I tit loosely a bent finger, h, having two offsets or shoulders on its outer edge, as shown in Fig. 2, and shown (partially in dots) at l1, Fig. 1.

On the .inner side and near the lower angle of the breast or cloth beam B', I fit'a rockshaft, I, Fig. 2, rocking in suitable bearings. To this rockshaft I attach inilexibly a crooked arm, z', which is shown resting in the lower offsets in the linger h, Fig. 2, and also shown in part at i, Fig. 1, and another crooked ineXible arm at j, Fig. 2, (shown also in part atj, Fig. 1.)

I make the lifting-fork substantially in the form shown in Fig. 4, (the upper part of which is shown at k, Fig. 1, and the lower part atj', Fig. 2,) with prongs l Z to liftthe last ilingthread, or the one which has not been beaten up by the batteri or reed, as the red line m, above the level of the other illing-threads extending from the same selvage, p, to the other shuttles, as the blue line n, so that the hook muy pass over all the filling-threads which have .been beaten up, and only be caught by the lastand loose one.

On the under side of the breast or cloth beam Bf, I lit a crooked lever, K, which works on a fulcrum screw, o. The inner end of this leverpasses under a clamp, q,an l rests against an india-rubber spring, while the outer end rests against the stoplever L, all as shown in Fig. 2, and partially shown in Fig. l. The stopAlever L works on a fulcrum at. its lower end, 1', and against an india-rubber spring in the socket at .5, while its upper end rests in notches t, either as in Fig. 1 or 2.

I make the hook which is to be caught by the last filling-thread substantiallyin the form shownnin Fig. 3, the hooks near u, Figs. 1 and 3, to be caught by the filling-threzid, and the crooked extremity of o to rock the shaft l, Fig. 2. This hook apparatus slides freely from front to rear in bearings, one of which is seen at w, Figs. l and 2, another is in the end of bracket but concealed, and another for the front end at y, Fig. 2, and the crooked front end rests in the crooked arm j to rock the shaft I.

Having made the several parts and arranged them in their order, as before described, for weaving with several shuttles, if the last filling-thread, as m, Fig. 1, gets broken, or the bobbin is exhausted, there will be nothing to catch the hooks, Fig. 3, in relation to the race-beam or lathe, so that when the lathe is brought forward to beat up, the hooks will be left behind, and there will be nothing to rock the shaft I until the loose iinger/1,in its forward motion with the race-beam, receives in its lower offset the crooked arm t, which will cause the shaft I to rock so as to bring the loose finger It up until the upper oii'set or shoulder will come against the inner end of the lever K, all as represented in Fig. 2, when, by the continued forward motion ofthe racebeam, the inner end of the lever K will be forced against theyieldingindia-rubber spring near q, until the outer end ofthe lever K, by its pressure, will force the stop-lever L beyond the shoulder t, Fig. 1, when the rubber spring in the sockets will throw the stop-lever L from its position in Fig. 2 to that in Fig. 1, which will disconnect the power and stop the loom while in the act of beating up, so that another pick cannot be made until the filling is made right, but, when the last fillingthread is perfect, as indicated by the red line m, then, when the picker-block g returns to its place, as in Fig. 1, or when a shuttle comes into the. shnttle-box,t will force the lever a outward and rock the shaft H so as to elevate the fork, Fig. 4, which will raise the last lilling thread on its tines above the level of the other iilliugthreads, which have been beaten up, as the blue line m, all as shown in Fig. 1. Then, when the race-beam G is brought for ward to beat up, the filling-thread m, being raised, as before described, will catch the hooks, near u, and draw them forward, so that the crooked extremity of v will act upon the arm j, as shown in Fig. 2, and rock the shaft I so that the arin i will be so far removed that the finger h will not reach it, as indicated in Fig. 1, and the loom will go on independently of the stop-motion so long as the iilling continues perfect.

The parts ofthe apparatus may be shaped somewhat difieren tl y, and their location somewhat changed, for, while the rock-shaft H, by the action ofthe lever a, raises the fork-fines l l, and consequently the last llingthread, and the operation ot' the last iilling-thread on the hooks works the rock-shaft I, when the tilling is perfect, and, when the filling is broken, the loose finger 7L works the rock-shaft I, so as to bring the finger h against a lever, which stops the loom at once, it is all that is required for the purpose.

W'hat I claixn as my invention, and desire to secure by Letters Patent, is-

The combination of the hooks, Fig. 3, fork, Fig. 1I, and levers a and K with the rockshafts H and I, when the whole is constructed, arranged, and fitted to produce the desired result, substantially as herein described.

CHRISTOPHER DUGKWORTH.

Witnesses:

It. FrrZGERALD,

JN0. 1I. CRAIG. 

